#42397D

#42397D

Color Values

HEX

#42397D

RGB

66, 57, 125

HSL

247.9, 37.4%, 35.7%

HSV

247.9, 54.4%, 49.0%

CMYK

47.2%, 54.4%, 0.0%, 51.0%

OKLCH

0.391 0.111 286.1

Properties

Cool Dark Nearest: darkslateblue

Color Harmonies

Complementary

#42397D

#747D39

Analogous

#39527D

#64397D

#42397D

Triadic

#42397D

#7D4239

#397D42

Split Complementary

#42397D

#7D6439

#527D39

Tetradic

#42397D

#7D3952

#747D39

#397D64

Color Blindness Simulation

Original

#42397D

Protanopia

#3E3E6D

Deuteranopia

#3F3F69

Tritanopia

#42605D

Achromatopsia

#404040

CSS Usage

background-color: #42397D;
color: #42397D;
border-color: #42397D;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F6F5FA
100
#E9E7F3
200
#D1CEE9
300
#B1ABD9
400
#877DC4
500
#5C50AF
600
#4A408C
700
#3B3370
800
#2E2858
900
#242041
950
#171429

Contrast Checker

Text on white

9.94:1

AA Pass AAA Pass

Text on black

2.11:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Feb 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Feb 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Feb 19, 2026